Basf Aktiengesellschaft

Basf Se Corporation

Basf Corporation

Basf Coatings Ag

Peter Keller

Bernd Bruchmann

Rainer Blum

Bernd Stanger

Dietrich Scherzer

Roland Minges

Wolfgang Heider

Stephan Bauer

Bernd Bronstert

Angelika Maria Steinbrecher

Eva Wagner

Dietmar Haering

Frederic Lucas

Johannes Dobbelaar

Thomas Pouhe

Günter Staufer

Willy Van Pee

Jochem Henkelmann

Eckehardt Wistuba

Gerd Rehmer

Bernhard Schuler

Thomas Preiss

Gerhard Bauer

Josef Neutzner

Robert Rupaner

Chung-Ji Tschang

Andree Dragon

Oihana Elizalde

Martin Meister

Helmut M&ouml;hwald

Bernhard Otto

Sven Lawrenz

Siegmund Pohl

Werner Langer

Wolfgang Hubinger

Lydie Tuchbreiter

Wilfried Seyfert

Franz-Josef Mueseler

Jurgen Hartmann

Helmut Möhwald

Gerhard D&ouml;tter

Harald Schäfer

Helmut Mohwald

Gerhard Dotter

J&uuml;rgen Nahstoll

J&uuml;rgen Hartmann

Axel Ferber

Paul Jacobs

Wolfgang Huebinger

Arnold Schmitt

Gerhard Dötter

Wolfgang Hübinger

Nicolas Wiemer

Thomas Zech

Arno Dünkel

The present invention relates to improved water-dispersible polyisocyanates with enhanced gloss, more particularly for two-component polyurethane coating materials.

Water-dispersible polyisocyanates

The invention relates to a process for the preparation of water-emulsifiable isocyanates and to their use.

Water-emulsible isocyanates having improved gloss

The present invention provides a highly functional hyperbranched polyester which may be obtained by a process which comprises reacting a reaction solution containing solvent and reactants in the presence of an enzyme at a temperature above 60&#xb0; C. and a pressure above 500 mbar.

Method for producing highly functional, hyper branched polyester by means of enzymatic esterification

Countercurrent stripping pipe for removing volatile organic constituents from reaction products, having a column pipe () composed of a plurality of pipe sections (-), in which trays () are arranged, connections () for supplying and removing the reaction products and connections () for supplying and removing at least one stripping agent in countercurrent to the reaction products. In accordance with the invention, a plurality of successive trays () in each case are joined to one another and form at least two inserts (-) which can be removed from the column pipe ().

Countercurrent stripping pipe

The present invention relates to a process for preparing highly functional hyperbranched polyesters which comprises reacting a reaction solution comprising solvent and

Compositions suitable for electrochemical cells

Emulsifier system for aqueous emulsion polymerization

Countercurrent stripping pipe for removing volatile organic constituents from reaction products, having a column pipe () composed of a plurality of pipe sections (), in which trays () are arranged, connections () for supplying and removing the reaction products and connections () for supplying and removing at least one stripping agent in countercurrent to the reaction products. In accordance with the invention, a plurality of successive trays () in each case are joined to one another and form at least two inserts () which can be removed from the column pipe ().

Counterflow stripping tube

A process is described for preparing radiation-crosslinkable polymeric acrylates and methacrylates, which involves reacting an acrylate or methacrylate copolymer containing units having a reactive side group with a compound that contains a group which is capable of reacting with the reactive side group and also a group which is capable of forming free radicals under the action of actinic radiation. The preparation of the modified, photoactive polymers by polymer-analogous reaction makes it possible to do without the laborious handling of aggressive, specially synthesized monomers, especially acrylic esters. The products of the process can be employed widely as radiation-curable coating materials.

Method for producing polymers cross-linkable by radiation, acrylic or methacrylic acid esters

At least one single-stage or multistage stirrer which produces not only a tangential flow component but also an axial flow field is used in a stirred-vessel reactor in connection with the preparation of polymers by liquid phase polymerization.

Use of a single-stage or multistage stirrer to prepare polymers

Mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates (raw MDI) having a reduced iodine color number and a reduced chlorine content are prepared by reacting the corresponding mixtures of diphenylmethanediamines and polyphenylpolymethylenepolyamines with phosgene in the presence of at least one inert organic solvent at elevated temperature, and then, after phosgenation is complete, incorporating into the reaction mixture, in the presence or absence of the phosgene, a mixture of water and at least one monohydric or polyhydric polyoxyalkylene alcohol, preferably having a functionality of from 2 to 3, and advantageously having a hydroxyl number of from 20 to 1800, in an effective amount which advantageously comprises from more than 0.01 to 0.3% by weight of water (i) and from 0.5 to 5% by weight of a polyoxyalkylene alcohol (ii), in each case based on the weight of raw MDI, then removing the excess phosgene or the phosgene residues still present and the inert organic solvent, if desired adding to the reaction product up to 5% by weight, based on the weight of raw MDI, of at least one antioxidant based on phenol and/or aryl phosphite and thermally treating the reaction mixture.

Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates having a reduced iodine color number and a reduced chlorine content

Methine and azamethine dyes based on 5-membered heterocycles with a

The process of the present invention for removing residual volatiles from polymer dispersions by performing first chemical deodorization using an initiator to remove residual monomers and then physical deodorization to remove volatile constituents comprises conducting the chemical deodorization for as long as the decrease in monomers is greater than the increase in secondary components introduced into the dispersion by the initiator, to result reliably in polymer dispersions having a residual volatiles content of less than or equal to 100 ppm.

Removing residual volatiles from polymer dispersions

A process for the preparation of aqueous polymer dispersions of low viscosity with polymer volume concentrations of at least 50% by volume, based on the polymer dispersion, by free-radical emulsion polymerization of ethylenically unsaturated monomers, with the exception of vinyl halides and vinylidene halides, in the presence of at least one initiator and at least one initial polymer involves emulsifying the major proportion of the monomers in an aqueous dispersion of the initial polymer and supplying this emulsion continuously to the polymerization reaction.

Preparation of aqueous polymer dispersions of low viscosity with polymer

Growing community of inventors

Spiesen-Elversberg, Germany

Peter Keller